5166 sendmail package should be replaceable

@@ -193,10 +193,11 @@
         cmd/logins \
         cmd/ls \
         cmd/luxadm \
         cmd/lvm \
         cmd/machid \
+        cmd/mailwrapper \
         cmd/makekey \
         cmd/mdb \
         cmd/mesg \
         cmd/mkdir \
         cmd/mkfifo \